---
product_id: 2858702
title: "Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488"
brand: "fluval"
price: "C$779"
currency: NIO
in_stock: true
reviews_count: 8
category: "Fluval"
url: https://www.desertcart.ni/products/2858702-fluval-u4-bio-foam-pad-replacement-underwater-aquarium-filter-media
store_origin: NI
region: Nicaragua
---

# Optimized water flow Custom-fit foam pad Long-lasting filtration Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488

**Brand:** fluval
**Price:** C$779
**Availability:** ✅ In Stock

## Summary

> 🧼 Elevate your aquarium’s clean game with the perfect fit foam filter!

## Quick Answers

- **What is this?** Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488 by fluval
- **How much does it cost?** C$779 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/2858702-fluval-u4-bio-foam-pad-replacement-underwater-aquarium-filter-media)

## Best For

- fluval enthusiasts

## Why This Product

- Trusted fluval brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Engineered Pore Size:** Balances superior water flow with minimal clogging for consistent tank clarity.
- • **Trusted Brand Legacy:** Backed by Fluval’s decades of innovation, ensuring premium quality and performance.
- • **Durable & Easy Maintenance:** Lightweight, resilient foam that’s simple to rinse and replace, keeping your aquarium pristine.
- • **Precision Fit for Fluval U4:** Seamlessly locks in place to prevent debris escape and maximize filtration efficiency.
- • **Versatile Aquatic Compatibility:** Perfectly suited for freshwater, saltwater, and reptile habitats—one pad, endless possibilities.

## Overview

The Fluval U4 Bio-Foam Pad is a precision-engineered replacement filter media designed exclusively for the Fluval U4 Underwater Filter. Its custom-fit foam captures large debris efficiently while allowing optimal water flow to reduce clogging and extend filter life. Suitable for freshwater, saltwater, and reptile tanks, this durable pad ensures superior mechanical filtration and easy maintenance, backed by Fluval’s trusted legacy in aquatic innovation.

## Description

The Fluval Bio-Foam Pad was designed specifically for the U4 Underwater Filter model to captures large particles and debris for effective mechanical filtration, the crucial first stage in the filtration process. Custom fit to prevent bypass, the pad has a pore size that allows efficient water flow with less clogging for long-lasting filtration. The Fluval Bio-Foam Pad is suitable for freshwater, marine or reptile environments. For more fish tank accessories, check out other Fluval products including aquarium filters, aquarium heaters, aquarium air pumps, aquarium lights, aquarium rocks, aquarium thermometers, and aquarium stands. Fluval has a wide variety of products that are perfect for your pet fish to enjoy in any large fish tank, small fish tank, saltwater tank or freshwater tank. Fluval broke onto the aquatic scene in 1975 by introducing the world’s first 3-stage filter with synchronous motor technology – a breakthrough that is still applied in the industry today. Since then, Fluval has built a legacy around this pioneering spirit, relentlessly adapting in a changing world to launch innovative aquarium products that remain at the forefront of technology, and which set the bar in quality, style and functionality. Fluval’s mission is not just about building products that mimic the natural world, but inspiring aquarists of all skill levels to enjoy and respect the hobby for generations to come.

Review: Works great - fit like they should, some people don't like this filter in the reviews but they do a decent job and are easy to take to take out and rinse.
Review: Great quality unless you build your own filters. - Go with the name brand. Save the headache.

## Features

- Provides effective mechanical filtration
- Fits perfectly inside the filter chamber to prevent debris from escaping
- Ideal pore size allows efficient water flow, less clogging and long-lasting filtration
- Suitable for freshwater, saltwater or reptile environments
- Specially designed for use with the Fluval U4 Underwater Filter

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Fluval |
| Customer Reviews | 4.7 out of 5 stars 1,577 Reviews |
| Global Trade Identification Number | 00015561104883 |
| Item Form | Foam |
| Item Weight | 0.04 Kilograms |
| Manufacturer | Rolf C. Hagen (USA) Corp. |
| UPC | 015561104883 |

## Product Details

- **Brand:** Fluval
- **Item Form:** Foam
- **Item Weight:** 0.04 Kilograms
- **Manufacturer:** Rolf C. Hagen (USA) Corp.
- **UPC:** 015561104883

## Images

![Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488 - Image 1](https://m.media-amazon.com/images/I/51wc8ighknS.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great
*by A***R on December 30, 2023*

fit like they should, some people don't like this filter in the reviews but they do a decent job and are easy to take to take out and rinse.

### ⭐⭐⭐⭐⭐ Great quality unless you build your own filters.
*by D***. on November 7, 2025*

Go with the name brand. Save the headache.

### ⭐⭐⭐⭐⭐ Special water filters for aquariums
*by N***E on January 11, 2026*

Can’t find these in stores any more. Happy I could find them on Amazon. They fit my aquarium filter perfectly

## Frequently Bought Together

- Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488
- Fluval U Underwater Filter BioMax
- Fluval U4 Poly-Carb Cartridge, Replacement Underwater Aquarium Filter Media, 2-Pack, A492

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**Shop now:** [https://www.desertcart.ni/products/2858702-fluval-u4-bio-foam-pad-replacement-underwater-aquarium-filter-media](https://www.desertcart.ni/products/2858702-fluval-u4-bio-foam-pad-replacement-underwater-aquarium-filter-media)

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-01-22*